from info import constants, db
from info.models import User, News, Comment, CommentLike
from info.modules.news import news_blu
from flask import render_template, session, current_app, g, abort, jsonify, request

from info.utils.common import  user_login_data
from info.utils.response_code import RET




@news_blu.route('/followed_user',methods=["POST"])
@user_login_data
def follower_user():

    user = g.user
    if not user:
        return jsonify(errno = RET.SESSIONERR , errmsg = "用户未登录")

    # 1取参数
    user_id = request.json.get("user_id")
    action = request.json.get("action")

    if not all([user_id,action]):
        return jsonify(errno = RET.PARAMERR , errmsg = "参数错误")

    if action not in ["follow","unfollow"]:
        return jsonify(errno = RET.PARAMERR , errmsg = "参数错误")

    #取到要被关注的用户
    try:
        other = User.query.get(user_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR , errmsg = "数据查询错误")

    if not other:
        return jsonify(errno = RET.DATAERR , errmsg = "未查询到数据")

    print(type(user_id))
    print(type(other))

    # if user.id == user_id:
    #     return jsonify(errno = RET.DATAEXIST , errmsg = "自己不能关注自己")
    if user == other:
        return jsonify(errno = RET.DATAEXIST , errmsg = "自己不能关注自己")

    #4.根据需要执行的操作去修改相应的数据
    if action == "follow":
        if other not in user.followed:
            user.followed.append(other)
        else:
            return jsonify(errno=RET.DATAEXIST, errmsg="当前用户已经关注")
    else:
        if other in user.followed:
            user.followed.remove(other)
        else:
            return jsonify(errno=RET.DATAEXIST, errmsg="当前用户未被关注")
    return jsonify(errno = RET.OK , errmsg = "操作成功")


@news_blu.route('/comment_like',methods=["POST"])
@user_login_data
def comment_like():

    """
    1.获取参数
    2.检验参数

    新闻评论点赞
    :return:
    """

    user = g.user

    if not user:
        return jsonify(errno = RET.SESSIONERR , errmsg = "用户未登录")

    # 1.获取参数
    comment_id = request.json.get("comment_id")
    news_id = request.json.get("news_id")
    action = request.json.get("action")

    #2.检验参数
    if not all([comment_id,action]):
        return jsonify(errno = RET.PARAMERR , errmsg = "参数错误")

    if action not in ["add","remove"]:
        return jsonify(errno = RET.PARAMERR , errmsg = "参数错误")

    try:
        comment_id = int(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.PARAMERR , errmsg = "参数错误")

    #3.
    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR , errmsg = "数据查询失败")

    if not comment:
        return jsonify(errno = RET.NODATA , errmsg = "评论不存在")

    if action == "add" :
        comment_like_modle = CommentLike.query.filter(CommentLike.comment_id == comment_id,
                                                      CommentLike.user_id == user.id).first()

        if not comment_like_modle:
            #点赞评论
            comment_like_modle = CommentLike()
            comment_like_modle.user_id = user.id
            comment_like_modle.comment_id = comment_id
            db.session.add(comment_like_modle)
            comment.like_count+=1
    else:
        # 取消点赞评论
        comment_like_modle = CommentLike.query.filter(CommentLike.comment_id == comment_id,
                                                      CommentLike.user_id == user.id).first()
        if comment_like_modle:
            db.session.delete(comment_like_modle)
            comment.like_count -= 1


    try:
        db.session.commit()

    except Exception as e:
        db.session.rollback()
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR , errmsg = "数据库查询失败")

    return jsonify(errno = RET.OK , errmsg = "ok" )







@news_blu.route('/news_comment',methods= ["POST"])
@user_login_data
def comment_news():
    """

    评论新闻或者回复某条新闻指定的评论
    :return:
    """
    user = g.user
    if not user:
        return jsonify(errno = RET.SESSIONERR , errmsg = "用户未登录")

    # 1.获取参数
    """
    新闻id , 评论内容 ,回复的评论的id 
    """
    news_id = request.json.get("news_id")
    comment_content = request.json.get("comment")
    parent_id = request.json.get("parent_id")

    # 2.检验参数
    if not all([news_id,comment_content]):
        return jsonify(errno = RET.PARAMERR , errmsg = "参数错误")

    try:
        news_id = int(news_id)
        if parent_id:
            parent_id = int(parent_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.PARAMERR , errmsg = "参数错误")

    # 查询新闻并查询新闻是否存在
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR , errmsg = "新闻数据查询错误")

    if not news:
        return jsonify(errno = RET.NODATA , errmsg = "新闻数据不存在")

    #3.初始化一个评论模型并且赋值
    comment = Comment()
    comment.news_id = news_id
    comment.user_id = user.id
    comment.content = comment_content

    if parent_id:
        comment.parent_id=parent_id

#         添加到数据库
#           为什么要自己添加commit 因为 return 时候需要  commit 的ID
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()

    return jsonify(errno = RET.OK , errmsg = "OK" ,data = comment.to_dict())



@news_blu.route('/news_collect',methods=["POST"])
@user_login_data
def collect_news():
    """
    收藏新闻
    1.接收参数
    2.判断参数
    3.查询新闻,并判断新闻是否存在
    :return:
    """

    # 判断用户是否登录
    user = g.user
    if not user:
        return jsonify(errno = RET.SESSIONERR , errmsg = "用户未登录")

    # 1.接收参数
    news_id = request.json.get("news_id")
    action = request.json.get("action")
    parent_id = request.json.get("parent_id")



    # 2.判断参数是否存在
    if not all([news_id,action]):
        return jsonify(errno = RET.PARAMERR , errmsg = "参数错误")

    if action not in ['collect', 'cancel_collect']:
        return jsonify(errno = RET.PARAMERR , errmsg = "参数错误")

    try:
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.PARAMERR , errmsg = "参数错误")

    #3.查询新闻,并判断新闻是否存在
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR , errmsg = "数据查询错误")

    if not news:
        return jsonify(errno = RET.NODATA , errmsg = "新闻数据查询失败")

    #4.收藏或者取消收藏
    if action == "cancel_collect":
        #取消收藏
        if news in user.collection_news:
            user.collection_news.remove(news)

    else:
        #收藏
        if news not in user.collection_news:
            user.collection_news.append(news)


    return jsonify(errno = RET.OK , errmsg = "操作成功")




@news_blu.route('/<int:news_id>')
@user_login_data
def news_detail(news_id):


    # 查询用户登录信息
    user = g.user

    # 右侧的新闻排行的逻辑
    news_list= []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)

    # 定义一个空的字典列表 ,里面装的就是字典

    news_dict_li = []
    # 遍历对象列表.将对象的字典添加到字典列表中
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())


    #     查询新闻数据
    news = None

    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news :
        abort(404)

    # 更新新闻的点击次数
    news.clicks += 1

    is_collected = False

    if user:
    #     判断用户是否收藏当前页面
    #  collection_news ,可以不用加all.因为sqlalchemy中使用会自动加载
        if news in user.collection_news:
            is_collected = True

    #       去查询评论数据
    comments = []

    try:
        comments = Comment.query.filter(Comment.news_id == news_id).order_by(Comment.create_time.desc()).all()

    except Exception as e:
        current_app.logger.error(e)


    comment_like_ids = []
    if g.user:
        try:

            #需求 : 查询当前用户在当前新闻里面都点赞了那些评论
            #1.查询出当前新闻的所有评论([comment]) 取到所有的评论id [1,2,3,4,5]
            comment_ids = [comment.id for comment in comments ]
            # 2. 再查询当前评论中哪些评论被当前用户所点赞 （[CommentLike]）查询comment_id
            # 在第1步的评论id列表内的所有数据 & CommentList.user_id = g.user.id
            comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids),
                                                     CommentLike.user_id==g.user.id).all()
            # 3. 取到所有被点赞的评论id
            # 第2步查询出来是一个 [CommentLike] --> [3, 5]
            comment_like_ids = [comment_like.comment_id for comment_like in comment_likes]
        except Exception as e:
            current_app.logger.error(e)

    comment_dict_li = []
    for comment in comments:
        comment_dict = comment.to_dict()
        # 代表没有点赞
        comment_dict["is_like"] = False

        #判断当前遍历到的评论是否被当前登录用户所点赞
        if comment.id in comment_like_ids:
            comment_dict["is_like"] = True

        comment_dict_li.append(comment_dict)


    is_followed = False
    #如果新闻的作者 并且 登陆过的用户已关注过这个郭勇
    if news.user and user:
        #if news.user 在 user用户关注列表中
        if news.user in user.followed:
            is_followed = True

    data = {
            "user": user.to_dict() if user else None,
            "news_dict_li":news_dict_li,
            "news":news.to_dict(),
            "is_collected":is_collected,
            "is_followed":is_followed,
            "comments":comment_dict_li
    }


    return render_template("news/detail.html",data=data)